Pivotal spray arm and dish basket support for a dishwasher



Jan. 21, 1964 P. DANNENMANN ETAL 3,118,458

PIVOTAL SPRAY ARM AND DISH BASKET SUPPORT FOR A DISHWASHER Filed April16, 1962 United States Patent 3 118,458 PIVOTAL SPRAY ARM AND DISHBASKET SUPPORT FOR A DISHWASHER Paul Dannenmann and Klaudius Patzelt,Welzheim, Germany, assignors to G. Bauknecht G.m.b.H., Stuttgart,Germany, a corporation of Germany Filed Apr. 16, 1962, Ser. No. 187,704Claims priority, application Germany Nov. 14, 1961 2 Claims. (Cl.134--144) The present invention relates to dish-washing machines, of thetype in which the vessel defining casing has a door, a flap or shelfarranged on one of the side surfaces of the casing for moving arotatable crockery carrier in and out of the casing and in whichoperatively stationary washing nozzles are arranged outside the carrier.

Dish-washing machines having a revolving crockery basket and stationarywashing nozzles provided outside the basket are known. In these machinesit is diflicult to move the crockery basket into and out of the machineso that the introduction and removal of the crockery to be washedpresents difiiculties.

In another known type of dish-washing machine operatively stationarynozzles and a non-rotating crockery basket are provided, the basketbeing guided on slide- Ways, for instance with the interposition ofrollers. These crockery baskets are comparatively simple to take out ofa lateral door of such a dish-washing machine, and are thus easy to fillwith the crockery to be washed. The washing function of suchdish-washing machines is, however, not satisfactory since the washingjets always impinge upon the crockery from the same direction duringwashing. To remedy this defect, revolving nozzle-carriers have beenprovided. These result in a relatively great constructional expense.Whether the nozzles are located above or below stationary crockerybaskets, the installation of such crockery-washing machines iscomplicated, and the operation thereof is liable to give trouble.

The present invention obviates the disadvantages of the prior artindicated above by rotatably mounting the crockery-carrier upon an armwhich can be swung laterally out of the dish-washing machine, the pivotaxis of the basket support arm being located in one corner of the casingadjacent the door.

As a result, a dish-washing machine is provided which has an operativelyrotary crockery-carrier which can be swung out of and into the casingwith a minimum effort. No slideways, exposed to contamination, arerequired. The relatively movable parts of the bearings of the rockingarm can be protected against fouling by simple means, such as ordinarycover flaps or the like.

In a dish-washing machine constructed according to this invention, thecrockery to be washed may be conveniently placed in the crockery-carrierwhen the crockery basket is swung out of the casing. The carrier mayadvantageously be constructed in a known manner as a basket. Thecrockery basket may be easily taken olf the swungout carrier forcleaning. After being filled with crockery to be washed, the crockerybasket can be easily swung into the machine where it is set in rotation,during the washing operation, by a suitable drive. The drive for thebasket is preferably that disclosed in our co-pending application SerialNo. 187,705 filed April 16, 1962, for Dish-Washer Basket Drive based onWest German application No. B 64,779 Ic/34c filed November 14, 1961.

A further feature of the dish-washing machine according to the inventioninvolves arranging the washing or rinsing nozzles in the swinging armand in the column that holds the rocking arm. According to this featureof the invention, the swinging arm is mounted on a column arrangedadjacent the casing door, and secured, for instance,

above and below, in the casing. By this construction of the swinging-armbearing, only slight stresses occur in the casing of the machine, sothat the casing need not be made stouter than usual.

The vertical column and the basket carrying arm pivoted thereon are,according to a further feature of this invention, made hollow and supplythe washing water to the washing nozzles located on them. Thus thevertical column may be stationary and the carrier arm may be sojournaled to swing about this column. With this arrangement two sealingpackings are required, one above and one below the scavenging-fluidsupply to the swinging arm on the column.

It is also possible for the carrying arm to be rigidly fixed to thecolumn so that when the crockery basket is swung out the columnparticipates in the swinging movement. With this construction, sealingpackings are required on the supply of washing fluid, preferably at thelower end of the column.

The washing nozzles on the carrying arm and on the column may beprovided in readily removable nozzle-carriers, to facilitate cleaning ofthe nozzles. The nozzlecarriers may be sealed, in relation to thecarrying arm and to the column, by means of simple packings.

In its preferred form, the pivoted basket-carrying arm is connected tothe door of the machine casing so that it and the basket thereon arepositively swung out of the machine when the door is opened, and intothe machine when it is closed.

One constructional example of the invention is illustrated in theaccompanying drawing in which:

FIGURE 1 is a perspective view of a dish-washing machine according tothe invention;

FIGURE 2 shows the carrying arm of the crockery basket, with theVertical column.

FIGURE 1 illustrates in detail the vessel defining machine casing 1, atone side of which a pivoted door, flap or shelf 2 is provided. Withinthe machine casing 1, in a corner thereof adjacent the door 2, isarranged a vertical column 3. Column 3 carries at its lower end arockable basket carrying arm 4. At the free end 5 of the carrying arm 4a basket-like crockery carrier 6 is rotatably journaled. Thecrockery-carrier 6 is rotated during the washing operation, forinstance, by way of a drive roller 8 as is fully disclosed in ouraforesaid copending application Serial No. 187,705. The column 3 is madehollow for the purpose of supplying washing fluid. Removable washingnozzles 9 are arranged in column 3. A set of nozzles 10 is similarlyprovided on the swingable carrying arm 4.

FIGURE 2 shows more clearly the basket carrying arm 4 which swings aboutthe vertical column 3. In that figure, the nozzle-carrier 9 is showndetached from column 3. The supply of washing liquid to thenozzlecarrier 9 from the vertical column is effected through alongitudinal slot 11, which is sufficiently wide that choking orclogging is impossible. The nozzle-carrier 9 is secured to the column 3by the engagement of the slots or notches 12 located at the lower end ofthe nozzle-carrier 9 with corresponding pins 13 on the column 3 and bythe subsequent closure of the simple locking clamp 7 provided on thecolumn 3 at the upper end of nozzle-carrier 9. The nozzle-carrier 10 issimilarly secured to the basket carrying arm 4.

The invention may be embodied in other specific forms without departingfrom the spirit or essential characteristics thereof. The presentembodiment is therefore to be considered in all respects as illustrativeand not restrictive, the scope of the invention being indicated by theappended claims rather than by the foregoing description, and allchanges which come within the meaning and range of equivalency of theclaims are therefore intended to be embraced therein.

What is claimed and desired to be secured by Letters Patent is:

1. In a dish washer having a casing formed with a side opening, a doorfor said side opening and mounted on said casing, and a rotarybasket-like crockery carrier, the improvement comprising a verticalrigid hollow support column mounted in said casing in one corneradjacent said side opening, a hollow arm supported on said column forpivotal movement about the axis thereof, and means supportingly mountingsaid carrier on said arm for rotation about an axis extending in spacedapart parallel relation to the axis of said column and permitting saidcarrier to be swung by said arm laterally through said side opening formovement into and out of said casing, said column and said arm eachhaving a longitudinal row of nozzles directed inwardly of said casingwhereby fluid introduced into said column and said arm is adapted to bedischarged through said nozzles in a 20 plurality of jets onto crockerycontained on said carrier.

2. The dish washer defined in claim 1 wherein the rows of nozzles onsaid column and said arm are embodied in members detachably connected tothe remainders of said arm and said column respectively to facilitateready removal of said nozzle rows.

References Cited in the tile of this patent UNITED STATES PATENTS1,143,217 McGrath June 15, 1915 1,444,902 Callahan Feb. 13, 19231,574,452 South Feb. 23, 1926 1,633,803 Ballin June 28, 1927 1,645,869Murdoch Oct. 18, 1927 1,941,915 Rosenberger Jan. 2, 1934 2,342,742 LoebFeb. 29, 1944 2,607,405 Weinandy Aug. 19, 1952 2,687,137 Kramer et alAug. 24, 1954 2,702,558 Blanchard Feb. 22, 1955 FOREIGN PATENTS10,632/32 Australia Ian. 11, 1934

1. IN A DISH WASHER HAVING A CASING FORMED WITH A SIDE OPENING, A DOOR FOR SAID SIDE OPENING AND MOUNTED ON SAID CASING, AND A ROTARY BASKET-LIKE CROCKERY CARRIER, THE IMPROVEMENT COMPRISING A VERTICAL RIGID HOLLOW SUPPORT COLUMN MOUNTED IN SAID CASING IN ONE CORNER ADJACENT SAID SIDE OPENING, A HOLLOW ARM SUPPORTED ON SAID COLUMN FOR PIVOTAL MOVEMENT ABOUT THE AXIS THEREOF, AND MEANS SUPPORTINGLY MOUNTING SAID CARRIER ON SAID ARM FOR ROTATION ABOUT AN AXIS EXTENDING IN SPACED APART PARALLEL RELATION TO THE AXIS OF SAID COLUMN AND PERMITTING 